The names of some organic molecules incorporate specific information about stereochemistry using shorthand notation. One such example is (2R,3R)-2-bromo-3-chlorobutane. This name is written following the nomenclature rules established by IUPAC (International Union of Pure and Applied Chemistry). These rules specify the punctuation to be used in writing the name of a molecule. Write this name exactly as it appears above. (Note: You will not be able to italicize the "R" labels, but you should match exactly the punctuation in the rest of the name.)

In a laboratory determination of the atomic weight of tin, a sample of tin is weighed in a crucible. nitric acid is added, and the reaction proceeds to give a hydrated tin(iv)oxide plus no2and h2o. the hydrated tin(iv)oxide is then heated strongly and reacts as follows: sno2.xh2o(s)sno2(s)+ xh2o(g)the sno2is finally cooled and weighed in the crucible. explain the effect on the calculated atomic weight of tin that would result from each of the following experimental errors: (a)considerable spattering occurs when the nitric acid is added to the tin.(b)the hydrated tin(iv)oxide is not heated sufficiently to change it completely to tin oxide.